Hi @janidai, if you are using MIPI CSI camera with the Nano DLI notebooks, you may want to try USB camera instead, or try these suggestions. You can also check that you disabled ZRAM and mounted SWAP like shown here. Also the Nano DLI is meant to be run headlessly, without display attached.
You can also try these DNN trainings from Hello AI World - https://github.com/dusty-nv/jetson-inference
They should run on Nano 2GB.